[BUG] Decompiler blows up when decompiling case switches ( [et] Bug still in 3.7alpha #5667; Minimal test case identified )

[tomkoenig at mindspring.com]

With this method, I get the walk back (after shift left click twice):
foo: evt
	evt caseOf: {
		[ #Entry ] -> [  ^nil ].
		[ #Exit ] -> [ ^nil ].
	} otherwise:  [ ^#top: ]
And with this version, I donot
foo: evt 
	evt = #Entry
		ifTrue: [^ nil].
	^ #top:
	
MessageNotUnderstood: String>>isReturningIf













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